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I actually printed 2020 at first, got fed up with it, and then just ordered 3030. I threaded 100mm long 1mm thick single walled printed 2020 onto 5/16inch threaded rods. Everything was going fine until I decided to bring the entire batch of printed 2020 to 100°C in the oven to add a bit of ease threading in the 5/16inch threaded rods. I watched a video that said you lose a bit on the Z axis doing this baking without mention of warping. This baking warped the printed 2020 - I should have known better and tested a single piece first. Perhaps it was the single walled nature of my specific parts that induced this warping. I still finished assembling a 400mm x 400mm frame with the printed 2020 which "seems" fairly rigid yet I believe only Salvador Dali would use it as a 3D printer... My experience/exposure is assembling a single DIY 3D printer kit and have no example of what acceptable rigidity is - thus I just went ahead and ordered the 3030. I may add some thoughts on this when I've learned more. For me, the time and cost of printing the 2020 was not worth attempting to circumvent the aluminum 3030. At the very least, it gave me some experience to share. The individual 100mm PLA printed 2020 extrusion is exremely tough and rigid by the way.